Deoland Fm
Period:
Statherian
Age Interval:
early-middle Statherian
Province:
Proterozoic N.India Vindhyan Basin east
Lithology and Thickness
Conglomerate at base, then overall fining-upward siliciclastic succession. Lower segment mainly conglomerate and pebbly sandstone (ca. 60 m); Upper segment (ca. 50 m) fines upward from sandstone to muddy siltstone.
Lithology Pattern:
Coarse-grained sandstone
Relationships and Distribution
Lower contact
On Archean basement
Upper contact
Transitions upward into dark-green Arangi Shale Member of Kajrahat Fm
Regional extent
Son Valley area.
GeoJSON
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Fossils
Age
Older than 1720 +/- 90 Ma. See discussion in Lower Vindhyan Gr; for graphic purposes 1750-1700 Ma.
Age Span:
Beginning stage:
Statherian
Fraction up in beginning stage:
0.25
Beginning date (Ma):
1,750.00
Ending stage:
Statherian
Fraction up in the ending stage:
0.5
Ending date (Ma):
1,700.00
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Main sources: S. Sarkar and S. Banerjee (2020), A Synthesis of Depositional Sequence of the Proterozoic Vindhyan Supergroup in Son Valley, Springer Geology, https://doi.org/10.1007/978-981-32-9551-3_2
Basu, P., and Chakrabarti, R. 2020. Origin and evolution of the Vindhyan Basin: A geochemical perspective. Proc. Indian Natn. Sci. Acad., 86: 111-126.